PlayStation Portable owners can hop on to PlayStation Store today for a demo of Dissidia Duodecim Final Fantasy. But don't go hopping anywhere without some yen in your wallet! The Duodecim demo is premium!

Titled Dissidia Duodecim Prologus Final Fantasy, the demo will set you back ¥300. Your three coins will get you two modes of play: story mode and arcade mode.

Arcade mode lets you experience battle against the CPU. The demo offers the full battle system, but does not offer any sort of customization component.

Story mode lets you play an original short scenario that connects to the main game. The scenario will not be included in the final release.

You'll find some other connective elements with the final release outside of just the story. You'll be able to carry accessories over from the demo. Having a demo save file will also give you access in the final version of the game to to Final Fantasy VII heroine Aerith as an assist character. The character is not included in the demo.

The announcement of Prologus came today at Square Enix's 1st Production Department Premier event. The event also saw the unveiling of a new trailer which showed off Final Fantasy X's Yuna in playable form for the first time since her recent Jump Magazine reveal. Yuna's voice actress was confirmed to be Mayuko Aoki, the same voice actress who portrayed the character in FFX.

At least one new character was revealed for the game. The trailer showed Final Fantasy XI's Prishe in CG form. In addition to this, Square Enix fan site FF-Reunion, covering the event live, reports that it saw some hints at the Gilgamesh character in the trailer.

Yuna (left) and Prishe (right). No gameplay was shown for Prishe.

The new Duodecim trailer is set to be posted to the game's official site in high resolution on the 27th, so you'll be able to judge for yourself if there are any hidden character hints.